Sentinel Rack (SER)

Online Double Conversion Rack Mount Uninterruptible Power Supply 1.5kVA – 3kVA

The Sentinel Rack is a rack-mounted version of the popular Sentinel Pro range of online uninterruptible power supplies. Advanced double conversion technology provides the highest levels of reliability and protection for critical servers, data processing IT systems, and telecoms networks. Available in 1500VA and 3000VA versions, both products sit at just 380mm deep, making them the ideal choice to upgrade power in server rooms housing 600mm deep legacy racks.

For applications requiring several hours’ autonomy, the SER 3000 ER is fitted with a 6A battery charger and additional battery packs for extra runtime. These plug and play UPS systems are designed to fit standard 19 inch cabinet racks and incorporate a Cold Start feature that enables them to power up even if there isn’t a mains supply. Choose from a wide range of operating modes (i.e. Online, Eco, Smart Active, Standby Off, Frequency Converter) to boost performance and improve energy efficiency.

Operating flexibility

Different operating modes that can be programmed according to user requirements and the load to be powered have been introduced in order to reduce energy

  • On line: maximum load protection and output voltage waveform quality
  • Eco Mode: the UPS uses line interactive technology, with the load powered by the mains, reducing consumption and thus improving efficiency (up to 98%).
  • Smart Active Mode: the UPS automatically selects on-line or line-interactive operation, depending on the quality of the mains supply, checking the number, frequency and type of disturbances present
  • Stand by Off (emergency): the UPS supplies the load only when the mains fails. The inverter begins working with a progressive start-up sequence to prevent
    inrush currents.
  • Frequency converter operation (50 or 60 Hz).

Battery optimisation

The Sentinel Rack range has a deep discharge protection device to optimise battery life. Periodically the UPS carries out a battery efficiency test (which can also be manually
activated); its wide input voltage tolerance range helps to reduce battery usage and maintain performance over time.

Runtime expandability (SER 3000)

Optional battery extension packs can be connected to increase UPS runtime. SER 3000 ER version is designed without internal batteries and more powerful battery chargers to achieve longer runtimes.

High battery reliability

  • Automatic and manual battery test
  • Proper battery care is critical to ensuring correct UPS operation in emergency conditions. The Riello UPS battery care system consists of a series of features and capabilities to optimise battery management and obtain the best performance and operating life possible
  • Unlimited extendible runtime using matching Battery Boxes
  • The batteries do not cut in during mains failures of <20 ms (high hold up time) or when the input supply is between 184 V to 276 V

Advanced Communications

  • Advanced multi-platform communications for all operating systems and network environments: PowerShield3 monitoring and shutdown software for Windows operating systems 10, 8, 7, Hyper-V, 2012,2008, and previous versions, Mac OS X, Linux, VMWare ESXi, Citrix XenServer and other Unix operating systems
  • RS232 serial and USB ports
  • Slot for installation of communications boards
  • UPS Tools configuration and customisation software supplied as standard


Series Table

Model Power (VA/W)Nominal Voltage Voltage ToleranceDimensions (WxDxH)(mm)
SER15001500/1350220-230-240 Vac230 Vac ± 20%450 x 380 x 87 (2U)
SER300 ER3000/2700220-230-240 Vac230 Vac ± 20%450 x 380 x 87 (2U)

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